Calibrated values of model parameters for the study area
| Sub-basin . | Reach . | Parameters . | Initial value . | Optimized value . |
|---|---|---|---|---|
| W40 | – | Constant Rate (CR) | 1.2 | 1.88 |
| W50 | – | Constant Rate (CR) | 1.3 | 1.94 |
| W80 | – | Constant Rate (CR) | 1.8 | 2.3 |
| W90 | – | Constant Rate (CR) | 1.7 | 1.94 |
| W40 | – | Initial Deficit (ID) | 3.2 | 3.27 |
| W50 | – | Initial Deficit (ID) | 2.2 | 2.26 |
| W80 | – | Initial Deficit (ID) | 4.2 | 4.26 |
| W90 | – | Initial Deficit (ID) | 4.5 | 4.56 |
| All | – | Maximum deficit (MD) | 152 | 152.1 |
| – | R20 | K | 140 | 140.23 |
| – | R30 | K | 145 | 150 |
| – | R20 | X | 0.15 | 0.085 |
| – | R30 | X | 0.21 | 0.26 |
| W40 | – | Lag time (Tlag) | 2,615 | 2,615 |
| W50 | – | Lag time (Tlag) | 1,107 | 1,107 |
| W80 | – | Lag time (Tlag) | 1,458 | 1,458.5 |
| W90 | – | Lag time (Tlag) | 1,884.9 | 1,885 |
| Sub-basin . | Reach . | Parameters . | Initial value . | Optimized value . |
|---|---|---|---|---|
| W40 | – | Constant Rate (CR) | 1.2 | 1.88 |
| W50 | – | Constant Rate (CR) | 1.3 | 1.94 |
| W80 | – | Constant Rate (CR) | 1.8 | 2.3 |
| W90 | – | Constant Rate (CR) | 1.7 | 1.94 |
| W40 | – | Initial Deficit (ID) | 3.2 | 3.27 |
| W50 | – | Initial Deficit (ID) | 2.2 | 2.26 |
| W80 | – | Initial Deficit (ID) | 4.2 | 4.26 |
| W90 | – | Initial Deficit (ID) | 4.5 | 4.56 |
| All | – | Maximum deficit (MD) | 152 | 152.1 |
| – | R20 | K | 140 | 140.23 |
| – | R30 | K | 145 | 150 |
| – | R20 | X | 0.15 | 0.085 |
| – | R30 | X | 0.21 | 0.26 |
| W40 | – | Lag time (Tlag) | 2,615 | 2,615 |
| W50 | – | Lag time (Tlag) | 1,107 | 1,107 |
| W80 | – | Lag time (Tlag) | 1,458 | 1,458.5 |
| W90 | – | Lag time (Tlag) | 1,884.9 | 1,885 |
Note: The time lag is in min, the initial and maximum deficit is in mm, X (–), K is in h, and the constant rate is in cm/h. W40, W50, W80, and W90 are the sub-basins of Arjo-Didessa in Wama, Lower Arjo-Didessa, Middle Arjo-Didessa, and Upper Arjo-Didessa, respectively, while R20 and R30 are reached in the Middle and Lower Arjo-Didessa sub-basins.